Heavy quark spin partners of the $Y(4260)$ in coupled-channel formalism

Muhammad Naeem Anwar, Yu Lu

The charmoniumlike state $Y(4260)$ is described as predominantly a $D_1\bar{D}$ molecule in a coupled-channel quark model [Phys.\,Rev.\,D\,\textbf{96},\,114022\,(2017)]. The heavy…